Pipe coupling



July 4, 1933. B` G, HOWELL ET AL l 1,916,479

PIPE CoUPLNG Filed June 28, 1932 Y 'I Patented- July 4,. 'y' j f i 'Applicatqn filed' June 28,

This inventionV relates to flexible pipe cou- Y vplings whichr are adapted to vconnect adjacent Sive use or v'else unsatisfactory in providing ar permanently fluid tight construction.

jOneobject of this invention is to provide a flexible pipe joint whichovercomes the objections stated by its simplicity and rugged- Y ness ofconstruction.v

Another Objectis to provide a fluidftight expansion-permitting joint which is i capable of having concrete pipe cast into it.

Yet another Objectis to forma 'lekible' vcoupling'especially suited for use with pre- Vcast concrete conduits.

A still further object is to provide aV yield-y able rust resisting metallic pipe joint which i will be fluid-tight.underinternal pressures. Other objects and advantages will appear to those skilled in the `art from the following description in which: i

Fig. l is a longitudinal horizontalsection.

I lthrough the preferred form of joint,

Y constructed in Ythe following manner.:v A'

45' sleeve l and thebands 2 are lirst placed onone Fig. 2 is a vertical transverse section of the pipe showing the joint in elevation, and

Fig. 3 is asection similar to Fig. 1 of a modification. l Referring morefparticularly tothe draw- 1 A ing wherein ylike Vreference characters refer to likeparts, the portions .of themain pipe ends are shown at 3. In Fig. 1, where the the pipes may be ofprecast concrete or other commonly known pipe material, the joint is of the lpipe ends, the other pipe is then brought into close. Yproximity therewith, al-

lowing suliicient clearance for normal "longif tudinal expansion, approximately a quarter Y 'of an inch.V TheA sleeve and clamping bands BRUCE .GoRDoN Hownn-oniinnmenn, TExAAsg-NDIRA"rsronnfon .QR'LINGTQNQ iV 1932. 'serii No. 619,800. Y v

are then drawn` over the y adjacent pipe to close the gap. It may be' desirable to put the .clamps on after assembling the'vpipes and sleeve, this vdepends *on the typeof clamp used. To permit" the] desired flexibilityV the sleeve l is-providedwith a rib or corrugation f whichis formed intermediate the endsfof'the sleeveto substantially co'eX'tend withlthe clear-'j f I ance provided bctw'een'- the pipe ends, de-, V

scribed above. lnforder that the corrugaf" tion Vor ribbed portien Will properly alloweX- pansion, the sleeve is preferably made of somev Y fairly soft yieldable or malleablemetal such as lead; Lead'isalso desirable from the standf 'point of itsjwell known rust'r-esisting charact'er, but is understood that other materials l Vhaving similarordeslred characteristics are Y within the contemplation of thisinvention.

i Vev have discovered that in order to form- Y Va joint ofthe characterdescribed whichvwill. vsatisfactorily and more permanently: with# stand-internal highp'ressure without leakage, Y.

clamping the sleeve in place. Thebinder or i'illerm'a'y rpreferably consist of arich miX- itAis desirable to apply a fillertothe sleeveengaging portion of the precast. pipe beforey ture of sand, cement and lwater. Other4 fillers i y may be usedeffectively, however, withoutdef parting from the spirit of the present invention.V .After the filleris applied, the sleeve andclalnp's are vproperly placed in the manner previously described. `The clamps are drawn tight and when the filler liar'dens a very effective and simple expansion joint is formed..

. In Fig. 3 amodiiication is vshown which is,L more. effective for use where the conduit is to 1 beicast .into'tlie sleeve. Thesleeve 2`may bek ribbed and rolled to the proper 'size and shape, the rends are thenrolled about thewire bands 5 vto forma flange or bead. Withfthe band 2 in place the sleeve isplaced in a vformV and the rconcretel conduitJis cast therein.

`Vhen4 the concrete has yhardened and the i form isY removed the band is properly t'en` sioned and thus a permanently fluid-tight flexibleconnection is formed. v

It is seenthat we have providedl a novel i butyet simple, cheap, rugged and elfective fiuid-tight flexible pipe coupling.

We have described structural embodiments meV 2. Means for joining the abutting vends of pipe sections at the time they are being molded so as to provide for expansion and contraction due to temperature changes comprising a flexible metallic sleeve having an ex- 7i? Y pansion Zone 'adaptedto be anchored in the pipe ends at the time theyrare molded,'exible bands' disposed about the ends of lthe sleeve beyond the expansion zone, and means to contract'saidbands about said sleeve endsj 'i5 In testimony whereof I afliX my signature.

BRUCE GORDON HOWELL. Injtestimony whereof I afiX vmy signature.

IRA F. STONE. 

